Injector



(Modell) 2 SheetB-Sheet 1.

T. M. EYNON. v

INJECTOR.

No. 497,269. Patented May 9, 1893.

WITNESSES:

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' (ModeL) 2 Sheets-Sheet 2.

, T. M. EYNON.

INJECTOR.

Patented May 9, 1893.

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UNITED STATES PATENT OFFICE.

THOMAS M. EYN ON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE EYNON-EVANS MANUFACTURING COMPANY, OF PENNSYLVANIA.

INJECTOR.

SPECIFICATION forming part of Letters Patent No. 497,269, dated May 9, 1893.

Application filed March 24, 1892- Serial No, 426,221. (Model) T aZZ whom it may concern.-

Be it known that I, THOMAS M. EYNON, a citizen of the United States, residing in the city and county of Philadelphia, State of Pen nsyl- Vania, have invented a new and useful Improvement in Injectors, which improvement is fully set forth in the following specification and accompanying drawings.

My invention relates to improvements in boiler feeding injectors known as the doubletube or lifting class, the object of the invention being to lessen the cost of the injector, as simplifying the construction and reducing the number of parts thereof,inaking it reliable and effective. Furthermore, to regulate the capacity of the injector, with the lever that is used both to start and stop the action of the injector, and finally of the construction of the injector, whereby access may be readzo ily had to any part of the same without disturbing any of the other parts or removing the injector from its pipe connections, besides providing for the removal of deposits of lime or other foreign matter.

Figure 1 represents a longitudinal vertical section of an injector embodying my invention. Fig. 2 represents a horizontal section thereof. Figs. 3, 4., 5 and 6 represent transverse vertical sections on lines respectively 1,

3o 1, 2, 2, 3, 3, and 4-. 4 Fig. 1.

Similar letters of reference indicate corresponding parts in the several figures.

Referring to the drawings: A designates the case or shell of the injector, within which is 3 5 the steam chest B, the water receiving chamber O and overflow chamber D. Connected with the chest B is the steam supply pipe E and with the chamber 0 is the water supply pipe F.

0 G designates the discharge pipe at the end of the shell leading to the boiler, and II designates the overflow nozzle which is in com munication with the chamber D. In the discharge pipe G is the check valve G, which swings 5 on its axis. In the shellA is a longitudinally extending diaphragm J, which separates the chamber 13 from the chamber C,and likewise forms the chambers K, K, L, and L, besides forming ports M, N, P, Q, the walls of which constitute the seats of the valves R, S, T, U,

the stem of each of which is formed with a yoke V, and engaged by a cam W, the several cams being connected with a rotatable rod or shaft X, Whose bearings are on the shell A, and which is connected with an operating lever Y, so that when said rod is turned the several valves may be opened and closed according to requirements, the cams being so set, that while some of the valves are opened, others are closed, as Will be hereinafter more fully explained.

The port M forms a communication between the chambers B and'K. The port N forms a communication between the chambers 13 and K.

Z designates a steam nozzle of the suction tube A, the same being in communication with the chamber K and projecting into said tube.

B designates a steam nozzle of the forcing 7o tube C, the same being in communication With the chamber K and entering said tube, it being noticed that the tube A is in communication with the chambers G and L, and the tube 0 is in communication with the chambers L, and L.

' Seated intermediate of the water-receiving chamber 0, and the supply pipe F, is a rotary valve D, whose stem is connected with a crank arm E, the latter engaging with the lower end of the lever F, whereby said valve may be opened and closed for regulating the supply of water to said chamber, and consequently adjusting the capacity of the injeetor.

The lever Y is provided with a locking device F, whereby improper operation of the same and of the valve rod X is prevented, said rod being provided with suitable stuffing boxes for evident purposes.

The shell is provided with the plugs G which may be removed in order to afford access to the nozzle Z, E and tubes A, O. Plugs H and J are also provided, whereby access may be had to the valves R, S, P and Q. In the sides of the discharge pipe G are plugs K which allow access to the check valve G, without disconnecting the injector from its place of service. A plug L is also fitted to the pipe G, whereby access may be had to the loo check valve, when the same is to be ground, or for the purpose of removing lime and other matter from the face and seat.

The operation is as follows: Steam is primarily admitted into the chamberB, the valves R and S being primarily closed, and valves P and Q open. When it is desired to start the injector, the lever Y is turned, whereby the cam rod X opens the suction valve R, and steam enters the chamber K, from whence it is directed through the nozzle Z into the tube A, forming a vacuum and causing the water to flow into the chamber 0 through the pipe F, and forced into and through the tube A, and from thence into the chamber L through the valve T into the overflow chamber D, passing through the valve U into overflow nozzle H. As soon as the water is seen passing out of said overflow nozzle H, the leverY is gradually moved forward, closing the overflow valve T, causing the water to pass through the force tube 0. At the same time the force steam valve S is gradually opened and the force overflow valve U gradually closed, causing the water to overcome the boiler pressure in pipe G, the water passing from the chamber L around the upper part of the overflow nozzle H, as shown by the curved arrow, Fig. 1, through the open valve into the pipe G, resulting in a current being fully established and the water passing into the boiler. A farther movement of the lever causes the valve M to close gradually, which reduces the pressure of water, and consequently the quantity of water delivered to the tube 0, thus reducing the capacity of the injector or the quantity of water flowing through the supply pipe.

I employ a swinging check valve such as G, whereby the same is directly raised by the outflowing water, and there is a clear passage of the water from the chamber L to the discharge pipe G, thus reducing the friction of the water at said valve.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A double tube injector having steam, water-receiving and overflow chambers, and provided with two series of steam and overflow valves, at opposite ends of said injector the latter being connected with and operated by a single rotating cam shaft adapted to move them alternately and positively, substantially as described.

2. A double tube injector having two series of steam and overflow valves adapted to act successively on the feed water, a rotating cam shaft to which said valves are attached and which operates the same alternately, said valves being so adjusted that as said shaft is moved, the suction steam valve will open in advance of the forcing steam valve, and the suction overflow valve will close in advance of the forcing overflow valve, substantially as described.

3. An injector having steam, water-receiving and overflow chambers, two tubes, communicating with said chambers two series of steam and overflow valves, an actuating cam shaft operating said valves alternately, causing the suction steam valve to open in advance of the forcing overflow valve and a check valve in the discharge pipe, substantially as described.

4. An injector having a casing with a longitudinally extending diaphragm, steam receiving and overflow chambers above said diaphragm, and a water receiving chamber, and chambers K K, L and L, below said diaphragm, said chambers K and K, having valve communications with said steam chamber, and said chambers L, L, having valve communications with said overflow chambers, and a shaft to which said valves are operatively connected, said parts being combined substantially as described.

5. An injector having a casing with a longitudinal diaphragm, a steam chamber and an overflow chamber on one side of said diaph ragm, a water receiving chamber with valve inlet pipes, and chambers K, K, L, L, on the other side of said diaphragm valves aflording communication between said chambers K, K, and said steam chamber, valves affording communication between the said chambers L, L, and the overflow chamber, tubes and nozzles affording communication between the water and the chambers on the same side of the diaphragm, and a discharge pipe leading from one of said chambers, said parts being combined substantially as described.

6. An injector having its steam and overflow valves provided with an operating shaft, and a rotary valve in the water supply pipe operated by a lever which is common to said shaft and the stem of said rotary valve, substantially as described.

7. An injector having a casing with a lonoperatively engaging said valves, the tubes A, 0, located as described, and the discharge pipe G leading from said chamber L, said parts being combined substantially as described.

THOMAS M. EYNON. Vitnesses:

JOHN A. WIEDERSHEIM, A. P. JENNINGS.

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